1005)
The first Polish duke Mieszko I invaded Pomerania and subdued the gard of Kołobrzeg (Kolberg) and the adjacent areas in the 960s. He also fought the Wolinians, but despite a won battle in 967, he did not succeed in the town of Wolin itself. His son and successor Boleslaw I continued to campaign in Pomerania, but also failed to subdue the Wolinians and the lower Oder areas.
During the Congress of Gniezno in 1000 AD, Boleslaw created the first, yet short-lived bishopric in Pomerania Diocese of Kołobrzeg, subordinate to the Archdiocese of Gniezno, headed by Saxon bishop Reinbern, which was destroyed when Pomeranians revolted in 1005. Of all Lutici, the Wolinians were especially devoted to participation in the wars between the Holy Roman Empire and Poland from 1002 to 1018 to prevent Boleslaw I from reinstating his rule in Pomerania.
Read more about this topic: Conversion Of Pomerania, Diocese of Kolobrzeg (Kolberg, 1000